James authors



(No Model.)

J. AUTHOP,S. SEWING MACHINE.

No. 263,009. Patented Aug.22, 1882.

Immwi:

III/raider.

Wilnesses. 4

N. PETERS, Pmmumc mmr, Washinglon. ac

PATENT tries.

JAMES AUTHORS, OF TORONTO, ONTARIO, CANADA.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 263,009, dated August22, 1882, Application filed September 30, 1881. (No model.)

To all whom it may concern Be it known that 1, JAMES AUTHORS, of thecity of Toronto,-in the county of York, in the Province of Ontario,Canada, have invented certain new and useful Improvements inSewing-Machines, of which the following is a specification.

My invention ielates particularly to that class of sewing-machines inwhich the needlebar derives a reciprocating movement from the rotarymovement of the driving-shaft working at right angles to' it, and inwhich a circular bobbin fitting into a recess in the face of thecircular hook below the table is used, although parts of the inventionmay be applicable to other classes of machines.

The invention consists in the peculiar construction, arrangement, andcombination of parts, as more fully hereinafter described and claimed.

Figure 1 is a perspective view. Fig. 2 represents a front view, and alsoa cross-section, of the needle-bar end of the machine. Figs. 3 and 4 aredetails of the bobbins.

In the drawings, A is the main driving-shaft, supported in the usual wayin a frame B of ordinary form. At the needle-bar end, F, of this shaft Iplace a crank, 0, either in the disk, as shown, or otherwise. Apitman,tD, conmeets the crank O to the needle-bar E. A disk, F, isembedded in the front plate of the machine and pivoted on the pin G.This pin passes through a longitudinal slot in the needle-bar E, and hasfixed to its end a crank, H, which is connected to the crank O by thelink I.

It will he understood by any mechanic that the mechanical movementproduced by the connection described between the driving-shaft A, thedisk F, and needle-bar E will be a regular reciprocating movement to theneedlebar,

eifected only by the passage of the crank over the dead-center, whilethe disk will receive a rotary movement which will be more rapid at somepoints of its revolution than at others, owing to the fact that itscenter is difi'erent from that of the driving-shaft from which itderives its motion. At a point in the face of the disk F, which willmove at the desired rate of speed at the different points of therevolution of the disk to agree with the movement of the needle-bar andhook, I place a pin, J, over which the thread is passed on its way tothe needle, and which, owing to the differential movement of the disk.constitutes a rotating take-up which will perform its duty with regn- Ilarity and smoothness. A spring, L, is riveted at one end to the innerside of the front face of the machine, and is arranged to move hehindthe same, so as to take up the slack thread before it passes over thepin, and thus lay the thread smoothlyon the work. A slotted passage-way,M, in the front face-plate affords room for the movement of the threadpassing through it, caused-by the action of the spring on the thread asthe disk revolves.

On reference to Fig. 4, which is a detail of the book, a wedge-shapedprojection, N, will be noticed. This projection is attached to or formspart of the hook, and is situated opposite to its sewing-point, so thatafter the descent of the needle and when itrises to form the loop thehook is in front, and. the wedge shaped projection, approaching theneedle at the same time, presses it forward toward the sewing-point ofthe hook, thereby making the needle pass the same point at each stroke,straightening the needle should it be bent, and making it impossible forthe hookto pass the needle without entering the loop. Consequently themachine will not drop stitches.

In a former part of the specification 1 described the rotating take-upas arranged to move slower at some points in its revolution than atothers. This irregular motion is re quired when the take-up is appliedto a hookmachine, as herein illustrated; but it will be understood thatit may be applied to a shuttle-machine, in which case it should moveeven 1y, or nearly so, at all points in its revolution. In order tocause this even motion it is only necessary to adjust the center of thetake-up on a line with the center of the driving-shaft, which may beeasiLy done by moving the faceplate upon which the take-up is pivoted.

As is shown in Fig. 3, the open face of the hook O is protected by acap, P. This cap is secured to a shank or pin, Q, which is fittedlooselyin the hole in the arm R and is pivoted therein by a rivet orpin, .9, so that it will be free to rock on said pivoted pin. By thisconstruction the cap, although holding the bobbin in position in thehook, does not present any obstruction to the thread between it and theface of the bobbin.

What I claim as my invention is- 1. In a sewing-machine, the combinationof a disk, F, a shaft secured to said disk, revolving in a differentline from the main shaft, the needle-bar E, having a slot to allow thepars sage of the disk-shaft, the crank H, secured to said disk-shaft onthe opposite side of the needie-bar, the crank-pin G, and the links D H,substantially as and for the purpose specified.

2. On the face of a sewing-machine, a horizontal spring, riveted theretoand arranged in combination with a slotted gnideway cut in theface-plate and passing across the spring, for the purpose of taking upthe slack thread produced by the movement of the take-up, substantiallyas specified.

3. In a sewing-machine having a circular bobbin fitting in a recess in arevolving hook, the combination of a cap or cover having its shankloosely fitted and pivoted in its hanger, whereby it is free tooscillate on its pivot to permit the thread to pass freely between itand the bobbin, substantially as set forth.

4. In combination with the needle or" a sewing-machine, a rotating hookprovided with a projection situatedopposite toits sewing-point, so thatit approaches the needle simultaneously with the hook, pressing ittoward the sewingpoint of the hook, substantially as and for the purposespecified.

. JAMES AUTHORS.

Witnesses:

G. W. BALDWIN, LEWIS To LINsoN.

